Besides the TRAINER TOWER in the north there's also the TANOBY CHAMBERS in the south which inside you can find the Pokemon unown but only after finishing the boulder puzzle in TANOBY KEY.
Beat the pokemon league.
7 island. --> In Sevault canyon on 7 island.
7 island a canyon
go to 7 island
you get him in 7 island and you must have a venasour
You must beat the seven gym leaders, the elite four, and your rival. Then you have to capture 60 Pokemon to get your Rainbow pass the will allow you to travel to Island 7 in Pokemon FireRed.
I hope this helped
A good place would be 7 island.
explore 7 island . GL !! ^^
the 7 island Pokemon tower owner may give you it.
There is no 12 Island. There are 7 islands - that's why it's called the Sevii Islands.
Go to 7 Island, there are a whole lot of strong Pokemon there.